Ouch! That looks pretty nasty. So sorry for your misfortune - I wish you a speedy recovery and best of luck getting back out shooting! Your warning is a good one, and one I need to remind myself of almost every time I go out, since 95% of the time I go alone, often enough to fairly remote locations (e.g. wildlife refuges, national parks, etc.). At 73, my decrepit body most definitely doesn't recover as quickly, and falls are the #1 risk for older folks. I've been lucky so far, but who knows what tomorrow will bring?
It's a concern when I'm in places like Yellowstone with no cell service, but I'm too cheap to invest in a sat phone.
In any event, once again good luck with your foot!